﻿/*
	[ru]	Пример работы с сценой.
*/

#include "Engine.h"
using namespace Engine;


//
// Example
//

class CExample : public ICoreEventListener
{
private:
	CRenderQueue			cRQ;
	CInputCameraComp		cCamera;
	IModelPtr				pScene,
							pSkyBox;
	float					fLastTime;
	uint					uInputIndex;
	bool					bIsCameraActive;

public:
	CExample(): fLastTime(0), bIsCameraActive(true), uInputIndex(0) {}

	~CExample() {}
	
	void Draw();
	void Process();

	virtual void OnInit();
	virtual void OnFree();

	virtual void OnUpdate();

	virtual void Release()									{ delete this; }
	virtual e_win_event::type GetEvents()					{ return e_win_event::UNKNOWN; }

	virtual void ProcessMessage(const TWindowEvent &sEvent)	{}
	virtual void OnException()								{}
	
	static int s_RunEngine();
};




inline void CExample::Draw()
{
	RENDERGL()->ClearBuffers();

	TCameraRenderQueue	*p_crq = nullptr;
	
	// build render queue
	if ( cRQ.GetRenderQueue( &cCamera, p_crq ) )
	{
		const frustum_t *	p_frustum;
		vec3				v_pos;
		vec2				v_clip;

		p_crq->Camera()->GetParameters( nullptr, nullptr, &p_frustum, nullptr, &v_pos, &v_clip, nullptr );
		p_crq->ClearMem();

		pScene->Render( IModel::TROParams(	*p_frustum,
											mat4::Translate( v_pos ) *
											mat4::Scale( vec3(10.f) ),
											v_clip.y - v_clip.x ),
											p_crq );
		pSkyBox->Render( IModel::TROParams( *p_frustum, mat4::Identity(), v_clip.y - v_clip.x ), p_crq );
	}

	// render
	RENDER()->GetRenderTech()->Render( &cRQ, uInputIndex );

	RENDERGL()->SwapBuffers();
}


inline void CExample::Process()
{
	INPUT()->Update();

	if ( INPUT()->IsKey(e_key::ESCAPE) )
		CORE()->QuitEngine();
	
	if ( INPUT()->IsMBClick(e_mouse::RIGHT) )
		bIsCameraActive = !bIsCameraActive;

	if ( bIsCameraActive )
	{
		TSNCompMessage	msg;
		msg.Update( nullptr, CORE()->GetUpdateTimeDelta() );

		cCamera.ProcessMessage( msg );
	
		INPUT()->CursorToCenter();
		INPUT()->SetParams( e_input_flags::HIDE_CURSOR | e_input_flags::EXCLUSIVE );
	}
	else
		INPUT()->SetParams( e_input_flags::UNKNOWN );


	if ( INPUT()->IsKey( e_key::F1 ) )	uInputIndex = 0;	// default
	if ( INPUT()->IsKey( e_key::F2 ) )	uInputIndex = 1;	// normals
	if ( INPUT()->IsKey( e_key::F3 ) )	uInputIndex = 2;	// depth
	if ( INPUT()->IsKey( e_key::F4 ) )	uInputIndex = 3;	// color
	if ( INPUT()->IsKey( e_key::F5 ) )	uInputIndex = 4;	// light
	if ( INPUT()->IsKey( e_key::F6 ) )	uInputIndex = 5;	// specular
	if ( INPUT()->IsKey( e_key::F7 ) )	uInputIndex = 6;	// world pos
	if ( INPUT()->IsKey( e_key::F8 ) )	uInputIndex = 7;
	if ( INPUT()->IsKey( e_key::F9 ) )	uInputIndex = 8;
	if ( INPUT()->IsKey( e_key::F10 ) )	uInputIndex = 9;
	if ( INPUT()->IsKey( e_key::F11 ) )	uInputIndex = 10;
	if ( INPUT()->IsKey( e_key::F12 ) )	uInputIndex = 11;

	if ( INPUT()->IsKeyClick( e_key::RETURN ) )
	{
		RENDERGL()->ScreenShot( "..\\screenshots\\screenshot" );
	}

	INPUT()->Reset();
}


void CExample::OnInit()
{
	bool	ret = true;

	IRenderTechnique	*p_tech = nullptr;

	ret &= RENDER()->GetRTManager()->CreateTechnique( p_tech, e_technique::DEFERRED_SHADING );
	RENDER()->SetRenderTechnique( p_tech );
	
	ret &= RESMAN()->Load( e_resource::MULTIMESH_MODEL, pScene, "scene.mdl" );

	{
		IMaterialPtr	p_mtr;
		CMultiMeshPtr	p_mesh;
		TMultiMesh		s_mesh;

		ret &= RESMAN()->Load( e_resource::MATERIAL, p_mtr, "skybox.ocf" );
		ret &= RESMAN()->Create( e_resource::MULTIMESH, p_mesh );
		ret &= RESMAN()->Create( e_resource::MULTIMESH_MODEL, pSkyBox );
		
		if ( Geometry::CreateCubeCM( s_mesh, 100.f ) )
			ret &= p_mesh->Create( s_mesh, e_mesh_flags::STATIC );

		ret &= ((CMultiMeshModelPtr)pSkyBox)->Create( (CMultiMeshPtr)p_mesh, uni_array<IMaterialPtr>( &p_mtr, 1 ) );
	}

	RENDERGL()->SetClearColor( color4f(0.3f) );
	RENDERGL()->SetClearDepth( 1.f );

	SMAN()->Enable( e_gl_state::DEPTH_TEST );
	SMAN()->Disable( e_gl_state::CULL_FACE );

	cCamera.SetType( CInputCameraComp::CT_FPS );
	cCamera.Create( vec3(), vec3(), vec2(1.f, 5000.f), 0.5f*0.78f );
	cCamera.SetSens( 0.07f, vec3(1.f), 0.02f, e_vec_swizzle::DEFAULT );

	TCameraRenderQueue *	p_crq = new TCameraRenderQueue();

	ret &= p_crq->Create( & cCamera, e_render_layer::ALL_BITS, e_renqueue_flags::UNKNOWN );

	cRQ.AddCamera( p_crq );

	ASSERT( ret );
}


void CExample::OnFree()
{
}


void CExample::OnUpdate()
{
	CORE()->Update();
	Draw();
	
	fLastTime += CORE()->GetUpdateTimeDelta();

	if ( fLastTime > 1.f/60.f )
	{
		fLastTime = 0.f;
		Process();
	}
}


int CExample::s_RunEngine()
{
	CExample	*		p_example			= new CExample();
	TEngInitParams		s_init_params;
	e_log_output::bits	e_log_bits			= e_log_output::LOG_FILE_BIT
											DEBUG_ONLY( | e_log_output::MESSAGE_BIT )
											;
	
	s_init_params.eFlags					= e_eng_init_flags::OPENGL_4_2
											| e_eng_init_flags::CORE_PROFILE
											| e_eng_init_flags::EXTENDED_CONTEXT
											//| e_eng_init_flags::DEBUG_MODE
											//| e_eng_init_flags::STREAMED_LOAD
											//| e_eng_init_flags::STEREO
											//| e_eng_init_flags::ES2_PROFILE
											;
	s_init_params.sApplicationName			= "Simple Sacene";
	s_init_params.sClassName				= "";
	s_init_params.pHandle					= nullptr;
	s_init_params.pIcon						= nullptr;

	s_init_params.sAudioParams.sAudioDevice	= "";

	s_init_params.sRenInit.uColorDepth		= 32;
	s_init_params.sRenInit.uZBufferDepth	= 24;
	s_init_params.sRenInit.uStencilDepth	= 0;
	s_init_params.sRenInit.uColorSamples	= 0;
	s_init_params.sRenInit.uCSAASamples		= 0;
	s_init_params.sRenInit.uMSAASamples		= 0;
	s_init_params.sRenInit.uPixelFormat		= 0;

	s_init_params.sRenParams.bFullScreen	= false;
	s_init_params.sRenParams.bVSync			= true;
	s_init_params.sRenParams.eMode			= e_window_mode::ALLOW_SIZING | e_window_mode::CENTERED;
	s_init_params.sRenParams.sWinPos		= ivec2( 0, 0 );
	s_init_params.sRenParams.sWinSize		= ivec2( 640, 480 );
	
	s_init_params.sExtParams.uLogLevel		= 15;
	s_init_params.sExtParams.eLogFilter		= e_log_msg::FILTER_ALL;
	s_init_params.sExtParams.eResManFlags	= e_resman_flags::FREE_NON_REF | e_resman_flags::SET_DEFAUL_RES;
	s_init_params.sExtParams.sResDirectory	= "data";
	s_init_params.uLoadThreads				= 0;
	s_init_params.uRenderThreads			= 0;
	
	if ( !RunEngine( p_example, s_init_params, e_log_bits, "log.html", "data\\config\\settings.ocf" ) )
		return 1;

	return 0;
}


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	return CExample::s_RunEngine();
}